One
of the latest technology is now developing technologies WiMAX
(Worldwide Interoperability for Microwave Access) IEEE wireless
standards. 802.16X-2004. WiMAX is a platform used on the Metropolitan Area Network (MAN) previously used fiber optic.This technology uses OFDM mamapu provide high-speed data services of up to 70 Mbps within a radius of 50 km. Radius enough to make WiMAX as a broadband telecommunications network replacing fixed-line technology. When compared with the fixed-line WiMAX network installation cost is much cheaper. With WiMAX technology, the dream of cheap information services data at high speeds to be realized cheap quality is much better.WiMAX is a new technology that is expected to solve the existing problems in the broadband sector. When
the phone and started to walk to the local network wireless systems,
broadband access for business or housing is likely to rely on cable for
transmitting data. Clearly this is detrimental to operators as well as consumers who are outside the reach of the cable.
Based on the IEEE 802.16-2004 standard, the term "broadband" refers to a connection that has a bandwidth greater than 1 MHz and data transfer speeds above 1.5 Mbit / s consistently. From the definition above, it can be described that the Wireless Broadband Access (WBA) is a technology that allows for high speed data transfer which covers a large area. Generally, WBA services specified can include a radius of 30 miles or 50 km with downlink speeds of over 100 Mbit / s.Difference between the different characteristics and utilization of both wimax standard, IEEE 802.16-2004 and IEEE 802.16e, is not a barrier to combine the two standards with each other, even with the merger is expected to provide more economic value because both technologies will be mutually complement each other to build a WAN network that covered thoroughly, so that utilization is almost certainly resembles the use of mobile phones is available whenever and wherever.
The following are the characteristics of existing protocols for WiMAX technology,
a. IEEE 802.16aUsing the 2-11GHz frequency, can be used for the Non Line of Sight. This standard was finalized in January 2003. There are three specifications for the physical layer in the 802.16a, namely:1. Wireless MAN-SC: uses single carrier modulation format.2. Wireless MAN-OFDM: using orthogonal frequency division multiplexing (OFDM) with 256 point Fast Fourier Transform (FFT).3. Wireless MAN-OFDMA: using orthogonal frequency division multiple access (OFDMA) with 2048 point FFT.
b. IEEE 802.16-2004802.16-2004 standard that is based on 802.16 and 802.16a with someimprovement. 802.16-2004 is for services that are fixed or nomadic. There are two options in the transmission on the 802.16d TDD (Time Division Duplex) and FDD (Frequency Division Duplex). The system uses Orthogonal Frequency Division Multiplexing (OFDM) with carrier 256 and support for environmental Line of Sight (LOS) and Non Line of Sight (NLOS). This standard will operate in the frequency band 3.5 GHz and 5.8 GHz.
c. IEEE 802.16e802.16e WiMAX standard support for portable and mobile applications that are conditioned able to hand-off and roaming. The system uses techniques Scalable Orthogonal Frequency Division Multiplexing Access (SOFDMA), multi-carrier modulation technique that uses subchannelisasi. 802.16e standard can also be used to cover customers that are fixed (permanent). Candidates 802.16e greatest frequency utilization in the frequency band of 2.3 GHz and 2.5 GHz.
In general, the system consists of WiMAX Base Station (BS), Subscriber Station (SS) and a server behind BS like Network Management System (NMS) and the connection to the network. Configuring WiMAX is divided into 3 parts: SS, BS and transport sites. For SS located in the customer environment (can be fixed or mobile / portable) while the BS is usually located with the network operator (PSTN / Internet). WiMAX network configuration can be seen in the following figure:
1. Base Station (BS)Is the transceiver (transmitter and receiver) are usually installed one location (colocated) with the Internet Protocol (IP). Of BS will be connected to multiple CPE interfaces with media of radio waves (RF) that follows the WiMAX standard. BS components consist of:- NPU (networking card processing unit)- AU (access unit card) up to 6 +1- PIU (power interface unit) 1 +1- AVU (air ventilation unit)- PSU (power supply unit) 3 +1
2. AntennaAntennas used BS sector can be 60 °, 90 °, or 120 ° depending on the area to be served.
3. Subscriber Station (SS)In general, Subscriber Station (SS) or (Customer Premises Equipment) CPE consists of the Outdoor Unit (ODU) and Indoor Unit (IDU), there is a separate radio device and integrated with the existing antenna.
Based on the IEEE 802.16-2004 standard, the term "broadband" refers to a connection that has a bandwidth greater than 1 MHz and data transfer speeds above 1.5 Mbit / s consistently. From the definition above, it can be described that the Wireless Broadband Access (WBA) is a technology that allows for high speed data transfer which covers a large area. Generally, WBA services specified can include a radius of 30 miles or 50 km with downlink speeds of over 100 Mbit / s.Difference between the different characteristics and utilization of both wimax standard, IEEE 802.16-2004 and IEEE 802.16e, is not a barrier to combine the two standards with each other, even with the merger is expected to provide more economic value because both technologies will be mutually complement each other to build a WAN network that covered thoroughly, so that utilization is almost certainly resembles the use of mobile phones is available whenever and wherever.
The following are the characteristics of existing protocols for WiMAX technology,
a. IEEE 802.16aUsing the 2-11GHz frequency, can be used for the Non Line of Sight. This standard was finalized in January 2003. There are three specifications for the physical layer in the 802.16a, namely:1. Wireless MAN-SC: uses single carrier modulation format.2. Wireless MAN-OFDM: using orthogonal frequency division multiplexing (OFDM) with 256 point Fast Fourier Transform (FFT).3. Wireless MAN-OFDMA: using orthogonal frequency division multiple access (OFDMA) with 2048 point FFT.
b. IEEE 802.16-2004802.16-2004 standard that is based on 802.16 and 802.16a with someimprovement. 802.16-2004 is for services that are fixed or nomadic. There are two options in the transmission on the 802.16d TDD (Time Division Duplex) and FDD (Frequency Division Duplex). The system uses Orthogonal Frequency Division Multiplexing (OFDM) with carrier 256 and support for environmental Line of Sight (LOS) and Non Line of Sight (NLOS). This standard will operate in the frequency band 3.5 GHz and 5.8 GHz.
c. IEEE 802.16e802.16e WiMAX standard support for portable and mobile applications that are conditioned able to hand-off and roaming. The system uses techniques Scalable Orthogonal Frequency Division Multiplexing Access (SOFDMA), multi-carrier modulation technique that uses subchannelisasi. 802.16e standard can also be used to cover customers that are fixed (permanent). Candidates 802.16e greatest frequency utilization in the frequency band of 2.3 GHz and 2.5 GHz.
In general, the system consists of WiMAX Base Station (BS), Subscriber Station (SS) and a server behind BS like Network Management System (NMS) and the connection to the network. Configuring WiMAX is divided into 3 parts: SS, BS and transport sites. For SS located in the customer environment (can be fixed or mobile / portable) while the BS is usually located with the network operator (PSTN / Internet). WiMAX network configuration can be seen in the following figure:
1. Base Station (BS)Is the transceiver (transmitter and receiver) are usually installed one location (colocated) with the Internet Protocol (IP). Of BS will be connected to multiple CPE interfaces with media of radio waves (RF) that follows the WiMAX standard. BS components consist of:- NPU (networking card processing unit)- AU (access unit card) up to 6 +1- PIU (power interface unit) 1 +1- AVU (air ventilation unit)- PSU (power supply unit) 3 +1
2. AntennaAntennas used BS sector can be 60 °, 90 °, or 120 ° depending on the area to be served.
3. Subscriber Station (SS)In general, Subscriber Station (SS) or (Customer Premises Equipment) CPE consists of the Outdoor Unit (ODU) and Indoor Unit (IDU), there is a separate radio device and integrated with the existing antenna.
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